Storage-battery grid.



Eff'. WACKWITZ. STORAGE BATTERY GRID.

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vr Alvm VA E i M/W I i E l F l W A C K W I T Z l I STORAGE BATTERY GRID.

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ERNEST F. W'ACKWITZ, OF CLEVELAND, OHIO, ASSIGNOR T0 THE PEERLESS MOTORCAR COMPANY, OF CLEVELAND, OHIO, A CORPGRATION 0F VOHI.

STQRAGE-BATTERY GRID.

Specification of Letters Patent.

Patented Nov'. ie, raie.

Application led Juy. 8,:1912. Serial Nol 708,156.

To all whom it may concern:

Be it lmown that I, ERNEST F. IVAGK- wrrz, a citizen of the UnitedStates, resid- -ing at Cleveland, in the county of Cuyahoga lgridv whichisv strong mechanically at and adjacent the terminal or terminalextension of the grid, and which is especially adapted for heavy dutybatteries which are required to deliver current at heavy amperage andvlow voltage.

The Vgrid forming the subject matter of this application is designedespecially for batteries intended to be used on motor veliicles forsupplying current to an electric vmotor for engine starting purposes,which batteries are` subjected to rough'usage on such vehicles, andtherefore are required to y be especially strong at and adjacent theteri erable amperage.

minals of the -grids and are required to supply to the starting-motorcurrent of consid- It will be understood,

. however, that my invention is not limited inits application tobatteries for this particular purpose.

In carrying out my invention, I, provide in the grids a numberA ofintegral current carrying ribs which extend radially from' the terminalthrough the grid tov different points on the frame and between theseribs I provide bars for holding the active material of the grid, theparts being so arranged that the ribs provide the necessary mechanicalstrength at an adjacentv terminal and at the same time constitutev lowresistance current conductors which extend from many parts of the gridto the terminal and carry the current in practically straight pathsdirectly to the terminal, so that all parts of .cordance with one formof my invent-ion.

' Fig. 2 is asectional View substantially along the line 2-2 of Fig. 1.Fig. 3 is a side elevation of a modified form of grid. Fig. 4 is asection substantially along the line 4-4 o Fig. 3. Fig. 5 is a sideelevation of a further modilication; and Fig. 6 is a sectionsubstantially along the line 6 6 of Fig. 5. Y

In all forms of my invention the grid is preferably rectangular in shapeand in-A cludes an outer frame-composed of the sides a, e', a2 and a3.At one corner, or" the grid, and in this case at the junction oi' thesides a and a is a terminal extension by Radiating from the terminal bare a number of in- `tegral ribs c which are preferably equallydistributed or spaced and extend in fan-like manner from the terminalacross the grid soas tojoin the sides a2 or a3. As hereI shown there aresix main ribs which extend from Athe terminal across the grid to thesides a2 and o3. At a ditance from the terminal and-intersecting theribs c is a transverse rib al extending from the side aA to the side awhich transverse rib is in the construction shown in Figs. l and 2 arcshaped, with the axis of the junction between the sides a and a as acenter of curvature. Extending rom this arc-shaped rib d to the sides c2and a3 and located between the sides a and a. respectively, and the ribsadjacent thereto and also between adjacent ribs c are short integralradial ribs c2. `All the ribs c and 02 and the sides a and a are taperedso that the electrical resistance of the ribsand of the sides isgradually decreased from the ends remote from the terminal, therebyprovding low resistance and the necessary current carrying capacity. Ialso provide between the radial'ribs andalso vbetween the sides a and arespectively, and the ribs adjacent thereto, integral cross bars whichserve primarily to retain the active material or paste in the grid,these bars being in 'all' lar in cross section, and those between any"ltwo ribs being relatively staggered, -as shown in the cross sectionalviews.

In the form of my invention shown in Fig. l, these transverse bars whichare shown at e are in arcs of concentric circles having a's their centerthe intersection of the sides a and a at the terminal b. Y

In the modification 'shown in Fig. 3, the transversely arranged rib.designated d, which extends from the side a to the side a', across theseveral radial ribs c, is iri regular in shape, extending 1n threediiierent straight lines at right angles respectively to the twooutermost ribs c, and to an imaginary line between the innermost pair ofribs c. Also in this modification, the transverse bars here designated eextend in straight lines parallel to the parts of the In theconstruction shown in Fig. 5., the mam transverse rib, here designatedd2 is Vstraightand extends in a diagonal direction across the grid,andthe transverse bars here designated @glare arranged in straight linesparallelto the rib cl2.

The constructions are otherwise the same, and similar or correspondingparts of the three forms of the grid which are not modified, areI inigs. 3 to 6 given the same reference characters as Figs. l and 2.

It will be seen that with the constructions which l have shownl anddescribed, the grid has extremely low internal resistance, and all partsof the battery plate are active, in view of the tact that current can beconducted from nearly all parte of the plate This construction renders'the grid admirably adapted for use in heavy duty batteries, which arerequired to deliver for short intervals at least, heavy amperagecurrent, and this is accomplished without the necessity for as greatsurface area as is required with ordinary grid constructions.Furthermore, by providing the integral radial ribs c with respect to theterminal, the grid is stronger at the terminal than' at any other point,by reason of the fact that the ribs converge and are therefore closelyarranged at the terminal, and also because the ribs are tapered and arewider at the terminal than at points remote therefrom. The grid istherefore in my construction strongest mechanically at the point wheregrids are usually weakest, and at the point where the greatestmechanical strength is required.

Having thus described my invention, what I claimll;

l. A storage battery grid comprising a frame having a terminal, aplurality of ribs integral with the frame and extending in differentdirections radially outward from the terminal, and a plurality oftransverse bars extending between the ribs and serving to hold theactive material to the grid.

Q ,A storage battery grid comprising a frame having 'a terminal, aplurality of ribs integral with Athe frame and extending in rality ofcross barsextending between the ribs and between the sides of the frameand the ribs adjacent thereto.

fl. A grid for storage battery plates com prising a frame having aterminal, a plu-- rality ot' ribs integral with the frame and extendingradially outward from the terminal to diiierent parts of the frame, atransverse rib extending across the grid and intersectingsaidradialribs, and a plurality' of shorter ribs located between theiirst mentioned ribs and extending romsaid transverse rib to the framein radial directions with respectM to the terminal.

5. A grid for storage batteries comprising a rectangular conductingframe having at one corner thereof a terminal. extension, a plurality ofequally spaced ribs integral with the trame and extending radially fromthe terminal extension to two sides of the frame, a plurality ot crossbars extending between the ribs and between the outermost ribs and theadjacent sides of the't'rame so to retain active material in the grid,said ribs being tapered and increasing in size from their ends remotefrom the terminal.

In testimony whereof, l hereunto ax my signature in the presence of twowitnesses. ERNEST F. V'ACKWITZ. Witnesses A. F. Kwis, A. J. HUDSON.

Ccpes of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

